Added support for enable VBO's and doing simplification.
Added support for enable VBO's and doing simplification.


stmh/osg,artoolkit/osg,omega-hub/osg,koshman86/osg,artoolkit/osg,ghub/osg,ghub/osg,ntoand/osg,stmh/osg,ntoand/osg,artoolkit/osg,stmh/osg,koshman86/osg,XiaoCC/osg,XiaoCC/osg,XiaoCC/osg,koshman86/osg,XiaoCC/osg,ghub/osg,stmh/osg,ghub/osg,omega-hub/osg,XiaoCC/osg,omega-hub/osg,ntoand/osg,koshman86/osg,stmh/osg,artoolkit/osg,ntoand/osg,omega-hub/osg